wigham



(No Model.) 2 SheetsSheet 1.

J. R. WIGHAM,

OIL LAMP FOR LIGHT HOUSES.

No. 387,939. Patented Aug. 14, 1888.

WITNESSES INVENTOR ATTORNEYS.

N. PETERS. Phclb-UMOgnpXwn waving. O. Q

2 Sheets-Sheet 2.

Patented Aug. 14

(No Model.)

J. R. WIGHAM OIL LAMP FOR LIGHT HOUSES No. 387,939

22 INVBNTOR ATTORNEYS.

nwhww whhtmiiil WITNESSES UNITED STATES PATENT rrrcn.

J OHN R. WIGHAM, OF MONKSTOW'N, COUNTY OF DUBLIN, ASSIGNOR TO THE ROSS PATENT LIGHTING COMPANY, (LIMITED,) OF DUBLIN, IRELAND.

OIL-LAMP FOR LIGHT-=HOUSES.

SPECIFICATION forming part of Letters Patent No. 387,939, dated August 14, 1888.

Application filed April 4, 1887. Serial No. 233,594. (No model.) Patented in England November 6,1884, No. 14,686.

To all whom it may concern.-

Be it known that I, JOHN RICHARDSON WIGHAM, of Monkstown, in the county of Dublin, Ireland, have invented a new and Im proved Oil-Lamp for Light-Houses, (for which I have obtained a patent in Great Britain, No. 14.686, dated November 6, 1884,) of which the following isa full, clear, and exact description.

My invention relates to a construction of oil-lamp provided with multiple wicks, more particularly applicable forlight-house illumination, having for its object to insure vivid combustion of the oil by supplying heated air by forced draft to the interior and exterior of the flames, and to dispense with the use of a glass or other transparent chimney inclosing the flames. I will describe this construction, referring to the accompanying drawings.

Figure 1 is an elevation showing the exterior of the burner and part of the chimney, which extends down only to about the top of the flame. Fig. 2 is a central vertical section, and Fig. 3 is a horizontal section on the line a: w of Fig. 2, both on a larger scale than Fig. 1.

A is the outer casing, the upper part of which supports the removable air-c0ne B. At the bottom of the casing A is an oil-chamber, O, supplied with oil bya pipe, b, from a reservoir at a suitable level to cause the oil to ascend to the desired height in the concentric wick-tubes E, which are of annular form, closed at the bottom. Three of these wick-tubes are shown in Figs. 2 and 3; but there might be only two of them or a number greater than three. Each of the wick-tubes communicates by a tube or by several tubes, 6, with the oil chamber 0. Within the casing A is an interior casing, D, with an annular air-space around it, this space being supplied with air under moderate pressure by a pipe, M, the mouth M of which opens into the air-chamber surrounding the interior casing, D. Through the casing D there are apertures m, which are small near the air-inlet m, but are larger the farther they are from the inlet. Thus the casing D,with its apertures m, operates as a baffle to the entering air, causing uniform distribution of the currents in the space within the casing D.

Above this space is a diaphragm, N, of wiregauze or finely-perforated metahthrongh which the air passes in a diflused manner into an upper chamber, F. From the chamber F air passes by the central opening and the annular openings (Z within and between the wick-tubes.-

A portion of the air also passes through perforations h in the cover of the chamber F into the space within a conical casing, 713", and from this space air passes up the annular space between concentric casings P and N, and also through perforations 71., up the annular space between the concentric casings N and B, the upper ends of which are formed with inwardlyturned lips to serve as air'detlectors. By these various passages air heated by contact with the wick-tubes is supplied to the flames of the concentric wicks inside and outside of each of them, the outermost air-supply being deflected toward the outer flame by the inwardlycurved lips of the casings N and B, and the innermost air-supply being deflected toward the inner flame by a central defiectingbutton, f, which is flared outward at its upper end. Above the burner there is an overhanging flue or chimney, O, madeof metal, with its lower end next the flame made of tale.

The knobs W (shown in Figs. 1 and 3) serve for raising or lowering the several wicks, each of them working a pinion gearing with a vertical rack in the usual way, and therefore not shown. A convenient form of rack-and-pinion gearing, applicable for raising and lowering the multiple wicks, is shown in Reissue Patent No. 7 ,165, dated June 6, 1876, and Reissue Patent No. 7,867, dated August 28, 1877. A capped tube, \V, is for conducting overflow of oil to any desired receptacle, and the oil-cock, by which the oilsupply is regu lated, has an index-dial, 1%.

The wick-tubes E are supported by the oiltubes 0, and the central air-tube d is supyo ported by arms (1 projecting from the inner wiclctubc.

Having thus described my invention, what I claim is In a mnltiple-wick lamp having several concentric wicl -tubes and intermediate concentricair-passages, the combination, with the N, and P, provided with upper inwardlyouter casing, A, having air-inlet M, of the inteturned lips, substantially as described.

rior casing,-D, provided with a series of aper- JOHN R. WIGHAM. tures, m, increasing in size the farther they Witnesses: are away from said air-inlet, the perforated WILLIAM OWENS,

33 Wicklow Street, Dublin. WM. HAYES,

12 Grafton Street.

diaphragm N, the chamber F, having a perforated cover, the conical easing if, having a perforated top, and the concentric casings B, 

